US334768A - Upright-piano action - Google Patents

Description

I. FUSO.

UPRIGHT PIANO AGTION.

(No Model.)

Patented Jan. 26, 1886.

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f, having fixed to it at its lower end a cush- UNITED STATES PATENT OFFICE.

IGNAZIO FUSO, OF BOSTON, MASSACHUSETTS.

UPRlGHT-PlANO ACTION.

SPECIFICATION forming part of Letters Patent No. 334,768, dated January 26, l86.

Application filed August 2.), 1885.

To all whom it may concern.-

Be it known that I, IGNAZIO FUso, of Boston, in the county of Suffolk, of the. Commonwealth of Massachusetts, have invented a new and useful Improvement in Upright-Piano-Forte Act-ions; and we do hereby declare the same to be described in the following specification and represented in the accompanying drawings, of which- Figure 1 is a vertical and longitudinal section, and Fig. 2 a rear elevation, of a piano key and hammer and the operative mechanism of the former containing my invention, the nature of which is defined in the claims hereinafter presented. Fig. 3 is a perspective view of the back-catch of the hammer. Fig. 4 is a top View of the tail 6 of the backcatch as bent or bowed or recessed, as hereinbetore described, such figure also representing the stop K and a part of its sustainingbar, to be explained.

In the said drawings, A denotes the key, directly over which and hinged to a station ary bar, a, of the action-frame B, is a lever or jack elevator, O. A push -bar, D, suspended from the said elevator, rests upon the key, and serves, when the key is struck, to force the elevator upward. Fulcrumed to the elevator and above it is a jack, E, which is a right angular lever whose upper arm, I), extends at its top into the notch c of th fulcrum-block d of the hammer F. The backcatch of the hammer is shown at G, it being, as usual, hinged to a stationary bar, H, which is held in place by screws 8, that go through it near its ends and screw into the frame B. The lower arm or tail, 6, of the said baclccatrh is made broader than usual and has an elliptical opening, t, extending down through it. and directly over the adjustable stop K, to be described. There is screwed into and down through the said lower arm or tail, 6, a screw,

ioned head, 9, to rest upon the elevator. hen the said elevator moves upward, it moves the back-catch properly toward the hammer, in order for the stop It thereof to fall upon the back-catch on the retreat of the ham mer from the string. 1

The adjustable stop K, arranged immedi- I ately underneath the opening tin the tail 6 of the back-catch is a headed screw that screws upward through a stationary cross-bar, I, ar-

Serial No. 175,608. (No model.)

ranged as represented, the said stop at its upper end being nicked diametrically to receive the end of the blade of a screw-driver when such blade is inserted through the said opening t. The head of the stop K is directly over the tail of the jack, which as the jack is elevated to throw the hammer forward is met by the tail of thejack, and as a consequence causes the jack, in its further advance upward, to be forced backward out of engagement with the hammer, to allow of such hammer falling away from the string and being caught by the back-catch. By having the tail of the back-catch provided with the opening t, as described, it becomes an easy matter to gain access with a screw-driver to the nick of the stop K, for turning the latter to effect its proper adjustment, as occasion may require.

It will be evident that, instead of making the tail of the bark-catch with a hole going down through it, such tail may be notched or recessed in one side of it where over the stop K, such being as shown in Fig. 4 at i. By having the baclvoatch fulcrumed or hinged to a bar, H, separate from the bar I, carrying the adjustable stop K, and held to the frame B by screws, as described, the said bar H, with its back catch or catches, can be removed from over the bar I and the stop or stops K, as the repair or recushioning of the back catch or catches as occasion may require, without the necessity, at the same time, of distributing the bar I and the adjustment of its stop or stops K.

I claim, in the upright-piano action 1. The tail of the backcatch, provided with a recess or opening arranged directly over the jack-stop to enable access to the upper end of such jack-stop to be had by a screw driver inserted in the recess or opening, all being substantially as set forth.

2. The back-catch stop having in its tail a recess or opening, t, as described, and hinged to a bar separate from that for supporting the adjustable stop of the jack, such recess or opening being arranged immediately over the upper or nicked end of the said adjustable stop, as set forth.

- IGNAZIO FUSO. Vitnesses:

R. H. EDDY,

ERNEsT B. PRATT.

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